The pink colour of phenolphthalein in alkaline medium is due to

Colour of phenolphthalein in acidic medium

The colour of phenolphthalein in acid is-

What is the colour of phenolphthalein in NaOH ?

When CH_3COOH_3+HCl is titrated with NaOH then at neutral point the colour of phenolphthalein becomes colourless from pink due to-

The colour of phenolphthalein indicator in basic solution is

What is the colour of phenolphthalein in basic solution?